Agricultural machinery gearbox with function of switching on and off gears

Abstract

The utility model relates to the technical field of gearboxes, in particular to an agricultural machinery gearbox with various gear switching functions. The transmission comprises a gearbox, and a first-gear shifting mechanism and a second-gear and third-gear shifting mechanism which are mounted on the gearbox, the first-gear shifting mechanism comprises a first-gear switch, a first-gear fork shaft and a first-gear shifting fork; the second-gear and third-gear shifting mechanism comprises a second-gear switch, a third-gear switch, a second-gear and third-gear fork shaft, a second-gear and third-gear shifting block, a second-gear and third-gear shifting fork and a second-gear and third-gear gear hub sleeve. Limiting grooves are formed in the first-gear shifting fork and the second-gear and third-gear shifting block, accurate positioning of the rotation angle and direction during gear shifting is guaranteed, accurate gear shifting is achieved, and the gear shifting reliability of the gearbox is improved; holes are reasonably formed in the upper cover and the box body, so that parts are compactly mounted, the internal space is fully utilized, crowding interference is avoided, and the overall compactness of the gearbox is improved; each gear switch has a signal output function, a specific electric signal is generated during operation and transmitted to a cab indicating lamp, a driver intuitively knows the current gear through on-off of the indicating lamp, and operation is convenient and accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox technical field, concretely relates to a farm machinery gearbox with each gear switch function. BACKGROUND

[0002] In the field of agricultural machinery, the gearbox is a key component of the transmission system, and the accuracy and reliability of its gear shifting have a significant impact on the work efficiency and performance of the agricultural machinery. The traditional gearbox gear display method is not intuitive, and the driver has difficulty in accurately determining the current gear, increasing the operation difficulty and the risk of misoperation. To solve these problems, the technical personnel in the field have made many attempts. For example, the patent with the patent number CN221278434U discloses a multifunctional fork shaft structure. When the gear shifting lever is operated to shift the fork shaft, the fork shaft shifts the gear to drive the block, and the block bottom side fork surface is used to realize the gear shifting of the first gear and the second gear of the automobile transmission. However, this scheme still has some shortcomings. The internal structure of the gearbox is not reasonably arranged, and the components are crowded, which not only increases the volume of the gearbox, but also easily causes interference, affecting normal operation. At the same time, there is a lack of effective positioning structure during gear shifting, which is prone to misalignment or errors, resulting in unstable operation of the gearbox, and even causing failure, and the gear display is still not intuitive enough. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a farm machinery gearbox with each gear switch function.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A farm machinery gearbox with each gear switch function, comprising a gearbox and a first gear shifting mechanism and a second and third gear shifting mechanism installed on the gearbox, wherein:

[0006] The first gear shifting mechanism comprises a first gear switch, a first gear fork shaft and a first gear shift fork, wherein the first gear switch is located on one side of the upper cover of the gearbox; the first gear fork shaft extends horizontally from one side of the gearbox to below the first gear switch; the first gear shift fork is sleeved on the first gear fork shaft, the upper end of the first gear shift fork is matched with the first gear switch, and the lower end of the first gear shift fork extends to the lower part of the gearbox and is engaged with the first gear driven gear through the first gear hub sleeve;

[0007] The two-three gear shifting mechanism comprises a two-gear switch, a three-gear switch, a two-three gear yoke, a two-three gear shifting block, a two-three gear shifting fork and a two-three gear tooth hub sleeve, wherein the two-gear switch and the three-gear switch are located on the side of the upper cover of the gearbox, the two-three gear yoke extends horizontally from the side of the gearbox to below the two-gear switch and the three-gear switch, the two-three gear shifting block is sleeved on the two-three gear yoke, the upper ends of the two-three gear shifting block are matched with the two-gear switch and the three-gear switch respectively, the lower end of the two-three gear shifting block is matched with the upper end of the two-three gear shifting fork, and the lower end of the two-three gear shifting fork extends to the lower part of the gearbox and is engaged with the two-gear driven gear and the three-gear driven gear on the two sides through the two-three gear tooth hub sleeve.

[0008] The technical scheme has the following beneficial effects: the gear position switches are arranged on the upper cover, and the gear position switches not only serve as the trigger points of the gear shifting operation, but also have the signal output function; when the gear position switches are operated, specific electric signals are generated and transmitted to the corresponding indicator lamps in the cab; the indicator lamps are turned on after receiving the signals, thereby providing the driver with intuitive feedback; for example, when the driver engages the first gear, the first gear switch outputs a signal, the first gear indicator lamp in the cab is turned on, and the driver can clearly know the current gear position.

[0009] In addition, the agricultural machinery gearbox with the gear position switch function has the following additional technical features.

[0010] According to one embodiment of the present application, the gearbox comprises an upper cover and a box body, the upper cover is provided with mounting holes matched with the first gear switch, the second gear switch and the third gear switch, and the side of the box body is provided with assembly holes matched with the first gear yoke and the two-three gear yoke.

[0011] The opening of the upper cover and the box body enables the components to be compactly installed in the gearbox, and the internal space of the gearbox is fully utilized; the gear position switch is installed on the upper cover, and the fork shaft is installed on the side of the box body, so that the components are not excessively crowded and interfered with each other, the overall compactness of the gearbox is improved, and the miniaturization and light weight of the gearbox are facilitated.

[0012] According to one embodiment of the utility model, the first passive gear and the second and third passive gears are arranged on the left and right sides of the box body.

[0013] In the technical solution, the first passive gear and the second and third passive gears are arranged on the left and right sides of the box body, so that the lateral space of the box body can be effectively utilized. When different gear positions are switched, power is transmitted to the corresponding passive gears through different paths, so that the power interference between different gear positions is avoided.

[0014] According to one embodiment of the utility model, the upper end of the first shift fork is in a block structure, and the block structure is provided with a limiting groove matched with the first switch; the first switch is in contact with the limiting groove, and drives the first shift fork to rotate along the first fork shaft, so that the lower first gear hub sleeve is engaged with the first passive gear, and the first gear is switched.

[0015] In the technical solution, when the first switch is in contact with the limiting groove, the switch can only move and exert force within the range allowed by the limiting groove, so that the rotation angle of the first shift fork is positioned, and the first shift fork can accurately drive the first gear hub sleeve and the first passive gear to move to the correct position for engagement.

[0016] According to one embodiment of the utility model, the second and third shift block is in a block structure, and the block structure is provided with a limiting groove matched with the second switch and the third switch on both sides; the second switch or the third switch is in contact with the limiting groove, and drives the second and third shift block to rotate along the second and third fork shaft, so that the lower second and third gear hub sleeve is engaged with the second passive gear or the third passive gear, and the second gear or the third gear is switched.

[0017] In the technical solution, the second switch and the third switch correspond to the limiting grooves on both sides of the second and third shift block, and the rotation direction and angle of the second and third shift block are independently controlled by operating different switches, so that the second gear or the third gear is switched; for example, when the second switch is operated, the switch is in contact with the limiting groove on one side of the second and third shift block, and drives the shift block to rotate in one direction, so that the second and third gear hub sleeve is engaged with the second passive gear; when the third switch is operated, the switch is in contact with the limiting groove on the other side, and drives the shift block to rotate in the other direction, so that the second and third gear hub sleeve is engaged with the third passive gear.

[0018] According to one embodiment of the utility model, the input end of one gear switch, two gear switch and three gear switch is connected with the controller of cab through control line respectively, and the output end of one gear switch, two gear switch and three gear switch is connected with the indicating lamp of cab through signal line respectively, and gear selection knob is arranged on the controller.

[0019] The utility model discloses a controller controls the opening and closing of one gear switch, two gear switch and three gear switch, and the closed loop reminding of indicating lamp, which is convenient for providing the shift success or not prompt for the driver.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] (1) One gear shift fork and two three gear shift block set up limit slot, cooperate with corresponding switch, guarantee the accurate positioning of rotation angle and direction when shifting, realize accurate gear shifting, improve the reliability of gearbox shifting.

[0022] (2) The upper cover and the box body are reasonably holed, compact installation of parts, make full use of internal space, avoid crowded interference, improve the overall compactness of gearbox, be favorable to miniaturization and light weight.

[0023] (3) Each gear switch has signal output function, and specific electric signal is generated when operating and is transmitted to the cab indicating lamp, and the driver can directly observe the current gear position through the indicating lamp, and the operation is convenient and accurate. DRAWINGS

[0024] Fig. 1 It is the top view of the utility model.

[0025] Fig. 2 It is one of the sectional view of the utility model.

[0026] Fig. 3 It is the second sectional view of the utility model.

[0027] In the drawing: 1, upper cover, 2, one gear switch, 3, two gear switch, 4, three gear switch, 5, one gear fork shaft, 6, one gear shift fork, 7, one gear tooth hub sleeve, 8, one gear driven gear, 9, two three gear fork shaft, 10, two three gear shift block, 11, two three gear shift fork, 12, two three gear tooth hub sleeve, 13, two gear driven gear, 14, three gear driven gear. CONCRETE IMPLEMENTING METHOD

[0028] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0029] Embodiment 1

[0030] As Figs. 1-3 shown, the embodiment provides a farm machinery gearbox with individual gear switch functions, comprising a gearbox, and a first gear shift mechanism, a second and third gear shift mechanism installed on the gearbox, wherein:

[0031] The first gear shift mechanism comprises a first gear switch 2, a first gear shift lever 5, and a first gear shift fork 6, wherein:

[0032] The first gear switch 2 is located on one side of the upper cover 1 of the gearbox;

[0033] The first gear shift lever 5 extends horizontally from one side of the gearbox to below the first gear switch 2;

[0034] The first gear shift fork 6 is sleeved on the first gear shift lever 5, the upper end of the first gear shift fork 6 is matched with the first gear switch 2, and the lower end of the first gear shift fork 6 extends to the lower part of the gearbox and is engaged with the first driven gear 8 through the first gear hub sleeve 7;

[0035] The second and third gear shift mechanism comprises a second gear switch 3, a third gear switch 4, a second and third gear shift lever 9, a second and third gear shift block 10, a second and third gear shift fork 11, and a second and third gear hub sleeve 12, wherein:

[0036] The second gear switch 3 and the third gear switch 4 are both located on one side of the upper cover 1 of the gearbox;

[0037] The second and third gear shift lever 9 extends horizontally from one side of the gearbox to below the second gear switch 3 and the third gear switch 4;

[0038] The second and third gear shift block 10 is sleeved on the second and third gear shift lever 9, the upper end of the second and third gear shift block 10 is matched with the second gear switch 3 and the third gear switch 4 on both sides, and the lower end of the second and third gear shift block 10 is matched with the upper end of the second and third gear shift fork 11;

[0039] The lower end of the second and third gear shift fork 11 extends to the lower part of the gearbox and is engaged with the second driven gear 13 and the third driven gear 14 on both sides through the second and third gear hub sleeve 12.

[0040] As Figs. 1-3As shown, the technical scheme increases each gear position switch on the upper cover 1, which not only serves as a trigger point for gear shifting operation, but also has a signal output function. When the gear position switch is operated, a specific electrical signal is generated and transmitted to the corresponding indicator light in the cab. After receiving the signal, the indicator light is turned on to provide intuitive feedback to the driver. For example, when the driver engages gear one, the gear one switch 2 outputs a signal, and the gear one indicator light in the cab is turned on, so the driver can clearly know the current gear position. Specifically, the gear one switch 2 is located on one side of the gearbox upper cover 1, and when the driver operates the gear one switch 2, the action of the gear one switch 2 is transmitted to the gear one switch 2 below through the gear one fork shaft 5 extending horizontally from one side of the gearbox; the gear one yoke 6 ensures that the action of the gear one switch 2 can accurately drive the yoke to move; the lower end of the gear one yoke 6 extends to the lower part of the gearbox and is engaged with the gear one driven gear 8 through the gear one gear hub sleeve 7; when the gear one yoke 6 moves, it drives the gear one gear hub sleeve 7 to move, so that the gear one driven gear 8 is engaged with the corresponding gear one driving gear, completing the gear shifting action of gear one and realizing the switching of the specific transmission ratio of power. For example, when the driver engages gear two or gear three, the gear two and three shifting block 10 is sleeved on the gear two and three fork shaft 9, and according to the operation of different switches, the gear two and three shifting block 10 moves in different directions, and the lower end of the gear two and three shifting block 10 cooperates with the upper end of the gear two and three yoke 11, and the movement of the shifting block drives the gear two and three yoke 11 to move; the lower end of the gear two and three yoke 11 extends to the lower part of the gearbox and is engaged with the gear two driven gear 13 and the gear three driven gear 14 on both sides through the gear two and three gear hub sleeve 12; according to the movement direction of the gear two and three yoke 11, the gear two and three gear hub sleeve 12 drives the corresponding gear two driven gear 13 or gear three driven gear 14 to engage with the corresponding driving gear, realizing the gear shifting action of gear two or gear three.

[0041] In addition, the agricultural machinery gearbox with each gear position switch function according to the above-mentioned utility model has the following additional technical features:

[0042] According to one embodiment of the utility model, the gearbox comprises an upper cover 1 and a box body, the upper cover 1 is provided with mounting holes matched with a gear one switch 2, a gear two switch 3 and a gear three switch 4; the side part of the box body is provided with assembly holes matched with a gear one fork shaft 5 and a gear two and three fork shaft 9.

[0043] In the technical scheme, the holes of the upper cover 1 and the box body enable each component to be compactly installed in the gearbox, fully utilizing the internal space of the gearbox; the gear position switch is installed on the upper cover 1, and the fork shaft is installed on the side part of the box body, avoiding excessive crowding and interference between components, improving the overall compactness of the gearbox, and being conducive to the miniaturization and light weight of the gearbox.

[0044] According to one embodiment of the utility model, the gear one driven gear 8 and the gear two and three driven gear 14 are respectively arranged on the left and right sides of the box body.

[0045] In the technical solution, the first gear passive gear 8 and the second and third gear passive gear 14 are arranged on the left and right sides of the gearbox respectively, so that the transverse space of the gearbox can be effectively utilized.

[0046] According to one embodiment of the utility model, the upper end of the first gear shift fork 6 is a block structure, the block structure is provided with a limiting groove matched with the first gear switch 2; the first gear switch 2 is in contact with the limiting groove, drives the first gear shift fork 6 to rotate along the first gear shift axle 5, thereby driving the lower first gear tooth hub sleeve 7 to mesh with the first gear passive gear 8, and first gear shifting is realized.

[0047] In the technical solution, when the first gear switch 2 is in contact with the limiting groove, the switch can only move and force within the range allowed by the limiting groove, so that the rotation angle of the first gear shift fork 6 is positioned, and the first gear shift fork 6 can accurately drive the first gear tooth hub sleeve 7 and the first gear passive gear 8 to move to the correct position for meshing.

[0048] According to one embodiment of the utility model, the second and third gear shift block 10 is a block structure, both sides of the block structure are provided with limiting grooves matched with the second gear switch 3 and the third gear switch 4; the second gear switch 3 or the third gear switch 4 is in contact with the limiting groove, drives the second and third gear shift block 10 to rotate along the second and third gear shift axle 9, thereby driving the lower second and third gear tooth hub sleeve 12 to mesh with the second gear passive gear 13 or the third gear passive gear 14, and second gear or third gear shifting is realized.

[0049] In the technical solution, the second gear switch 3 and the third gear switch 4 correspond to the limiting grooves on both sides of the second and third gear shift block 10 respectively, by operating different switches, the rotation direction and angle of the second and third gear shift block 10 are independently controlled, so that second gear or third gear shifting is realized; for example, when the second gear switch 3 is operated, the switch is in contact with the limiting groove on one side of the second and third gear shift block 10, drives the shift block to rotate in one direction, so that the second and third gear tooth hub sleeve 12 meshes with the second gear passive gear 13; when the third gear switch 4 is operated, the switch is in contact with the limiting groove on the other side, drives the shift block to rotate in the other direction, so that the second and third gear tooth hub sleeve 12 meshes with the third gear passive gear 14.

[0050] According to one embodiment of the utility model, the input ends of the first gear switch 2, the second gear switch 3 and the third gear switch 4 are connected with the controller of the cab through control lines respectively, and the output ends of the first gear switch 2, the second gear switch 3 and the third gear switch 4 are connected with the indicator light of the cab through signal lines respectively; the controller is provided with a gear selection knob.

[0051] In the technical solution, the controller controls the opening and closing of the first gear switch 2, the second gear switch 3 and the third gear switch 4, and the closed-loop reminding is realized through the indicator light, so that the driver is prompted whether the gear shifting is successful.

[0052] The use process of the above embodiment is as follows: as shown in the figure, Figs. 1-3

[0053] The driver operates the gear selection knob on the cab controller, and the controller sends a control signal to the corresponding gear switch according to the knob position. When it is first gear, the first gear switch 2 receives the signal and acts, because it cooperates with the upper end of the first gear fork 6, and the first gear fork 6 is sleeved on the first gear shaft 5, so the action of the first gear switch 2 drives the first gear fork 6 to rotate around the first gear shaft 5, and the lower end of the first gear fork 6 makes the first driven gear 8 mesh with the first driving gear through the first gear tooth hub sleeve 7, completing the first gear shifting.

[0054] When it is second gear or third gear, the driver operates the corresponding switch, and the second or third gear switch 4 abuts against the corresponding side limiting groove of the second and third gear block 10, drives the second and third gear block 10 to rotate around the second and third gear shaft 9, the lower end of the second and third gear block 10 cooperates with the upper end of the second and third gear fork 11, and then drives the second and third gear fork 11 to move, the lower end of the second and third gear fork 11 makes the second or third driven gear 14 mesh with the corresponding driving gear through the second and third gear tooth hub sleeve 12, realizing gear shifting.

[0055] When shifting, the gear switch generates an electrical signal to the cab indicator, and the indicator lights up to provide gear feedback for the driver.

[0056] Although the utility model has been described in detail with reference to the drawings and in conjunction with the preferred embodiments, the utility model is not limited thereto. Various equivalent modifications or replacements can be made to the embodiments of the utility model by those skilled in the art without departing from the spirit and essence of the utility model, and these modifications or replacements should be within the scope of the utility model. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.​

Claims

1. An agricultural machinery gearbox with switches for various gear positions, characterized in that, This includes the gearbox, and the first-gear shift mechanism and the second- and third-gear shift mechanisms mounted on the gearbox, wherein: The first gear shifting mechanism includes a first gear switch (2), a first gear fork shaft (5), and a first gear shift fork (6), wherein: the first gear switch (2) is located on one side of the upper cover (1) of the gearbox; the first gear fork shaft (5) extends laterally from one side of the gearbox to below the first gear switch (2); the first gear shift fork (6) is sleeved on the first gear fork shaft (5), the upper end of the first gear shift fork (6) cooperates with the first gear switch (2), and the lower end of the first gear shift fork (6) extends to the lower part of the gearbox and meshes with the first gear driven gear (8) through the first gear hub sleeve (7); The second and third gear shifting mechanism includes a second gear switch (3), a third gear switch (4), a second and third gear fork shaft (9), a second and third gear shift block (10), a second and third gear shift fork (11), and a second and third gear hub sleeve (12). The second gear switch (3) and the third gear switch (4) are located on one side of the upper cover (1) of the gearbox. The second and third gear fork shaft (9) extends laterally from one side of the gearbox to below the second gear switch (3) and the third gear switch (4). The second and third gear shift block (10) is sleeved on the second and third gear fork shaft (9). The upper ends of the second and third gear shift block (10) are respectively engaged with the second gear switch (3) and the third gear switch (4). The lower ends of the second and third gear shift block (10) are engaged with the upper ends of the second and third gear shift fork (11). The lower ends of the second and third gear shift fork (11) reach the lower part of the gearbox and mesh with the second and third gear driven gears (13) and the third gear driven gears (14) on both sides through the second and third gear hub sleeve (12).

2. The agricultural machinery gearbox with gear position switches as described in claim 1, characterized in that, The gearbox includes a top cover (1) and a housing. The top cover (1) has mounting holes that cooperate with the first gear switch (2), the second gear switch (3) and the third gear switch (4). The side of the housing has assembly holes that cooperate with the first gear fork shaft (5) and the second and third gear fork shafts (9).

3. The agricultural machinery gearbox with gear position switches as described in claim 2, characterized in that, The first-gear driven gear (8) and the second and third-gear driven gears (14) are respectively located on the left and right sides of the housing.

4. The agricultural machinery gearbox with gear position switches as described in claim 1, characterized in that, The upper end of the first gear shift fork (6) is a block structure, and the block structure is provided with a limiting groove that cooperates with the first gear switch (2). The first gear switch (2) abuts against the limiting groove, driving the first gear shift fork (6) to rotate along the first gear fork shaft (5), thereby driving the lower first gear hub sleeve (7) to mesh with the first gear driven gear (8) to realize first gear shifting.

5. The agricultural machinery gearbox with gear position switches as described in claim 1, characterized in that, The second and third gear shift block (10) is a block structure. Both sides of the block structure are provided with limiting grooves that cooperate with the second gear switch (3) and the third gear switch (4). The second gear switch (3) or the third gear switch (4) abuts against the limiting groove, causing the second and third gear shift block (10) to rotate along the second and third gear fork shaft (9), thereby causing the lower second and third gear gear hub sleeve (12) to mesh with the second gear driven gear (13) or the third gear driven gear (14) to realize the second or third gear shift.

6. The agricultural machinery gearbox with gear position switches as described in claim 1, characterized in that, The input terminals of the first-gear switch (2), second-gear switch (3), and third-gear switch (4) are connected to the controller in the cab via control lines, and the output terminals of the first-gear switch (2), second-gear switch (3), and third-gear switch (4) are connected to the indicator lights in the cab via signal lines; the controller is equipped with a gear selection knob.

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